The 1999 season of the Tonga Club Championship was the 21st season of top flight association football competition in Tonga.
[1] Lotohaʻapai United won the championship for the second time, the 2nd in a record streak of 11 titles in the Tonga Major League.
Lotohaʻapai United beat Kolofoʻou FC 2-0 in the final.
[2]